Sidewalk bicycle



April 23, 1929. J, L. s HWA TZ 1,710,194

S'IDEWALK BICYCLE Filed April 4, 1927 Patented Apr. 23, 1929.

UNITED STATES PATENT OFFICE.

JOSEPH L. SCHWARTZ, on PHILADELP-IA, PNNSYLVANIA, rassmnon To SIDWAY.

TOPLI'F ,COMPAN, on wasmnemo1v, PENNSYLVANIA.

SIDEWLK BICYCLE.

,lliis invention relates to ehildrensve* hic/les et the type Whieh are se1fpropdled and. has special reterenee to twe-wheelmlvm hirles tonunonly lcn mn as sidewaii; bicycles.

In the n1amrlacture o1 leviees of this type it is nential that the cost be lzept as low as is consi.tent with stregth and durability of [lue prodrwt. Il: is thcreiore important that tl1e vehi :ies be so eonstructed as to be qniekly and easily assembled. It is also essential tliat the Vehieles be readily adaptable te erating and shipment.

' Aceordingty it is an ol jerrt et tlxe present invention te se design the ;iclewallk bicycle forming the subject matter of the present application that it is adapted to be shipped in knoekdown condition and may be' easily and quicldy assembled. X

A further objeet et the invention resides in the provision o:t a novel. type of adjustment for tightening,

bicycle.

Other objeets and advantages 01: the inven tien Will be apparent from the following deseription When talen in connection with the accompanying drawing; in Which Figure 1 is a s'ide elevation 01 the sidewalk bicycle. V

Figure 2 is* an e11largd detail plan view of the chain tightening meehanism. 4

Figure 8 is a botton1 view of the nieehanism shown in Figure 2.

Figure 4 is a section taken online 4- 1 01' Figure 2.

Figure 5 is a section taken on 1ine 5 otFignre 1;nnd

Figure Gis a section tal:en on line '6-G of Figure 1.

Retrring to the drawings in greater detail the numeral 1 designates generally a girls sidewalk bicycle which includes the rbber tired wheels 2, steering post 8, seat 4, and prop 5. r

The main portion of the sidewalk bicycle in composed of a front trame and a rear -trame; the front trame eomprising a single bar 6 Wl11(ll is lient dmvnwardly as indicated in Figure 1 and .is provided with a horizontal extension 7. The npwardly inelined portion et the front frame or bar 6 is received in the metal stam} inn 8 oncireling the steering post and provided with a soeket 9.

The rear trame of the bicycle is of triangm 1ar design and consists of the upwardly inthe sProcket chain of the" 1927. Serial No. 180,853.

clined scat post 10 and bars 11,and the horizontal fork 12. The inclined bars 11are pivoted at tlieir npper ends to the upper end 0f theseat post 10 as indieated by the numeral 13 and at their lower ends to the rear ends of the horizontal :tork 12 as indicated by numeral 14:.

The lower end of the seat post 10 is seated in abearing member 15 in whiehis mounted' the driving ax]e 16 having'fixed to one end theieof a sproeket wheel 17. A cla1nping plate 18 eooperateS with the bearing member 15 to receive'and hold the bar 6. Integral with the elamping plate 18, at the rear there- 01. are diverging'arins 1.12.

The elampingplate 18 is locked to the bar 6 by means of a U-shaped boit 19 Which extends beneath the dumping plate 18 and has ends seeured to the bearing member 15 bymeans of nuts 20. A bolt 21 also extends th1ouglr the bearing member 15 and passes through the slotted end 22 of the bar 6 and through a slot 23 in tl1e clamping plate 18 where it*is locked by means of anut2t.

A rear aXle earrying the sproeket wl 1eel 25 is rotatably monntd at the joint between the bars 11 and fork 12. A sproeket chain 26 eonneetS the sproeket wheels 17 and 25 for driving the bicyle in the usual manner. The Ushaped member 12 has its base port-ion seated in the amis 112 of the elainping plate .18, and tlii8 latter eleme11t is proVded with an mawardly inelined lug 312 against whieh the member 12 seats; The arms 112 are secured to the member 12 by rivets or thelike as indicated in Figure 2. An adjusting serew 30 ,is provided for adjusting the tension et the sproeket ehain 26. This serew is provided with an apertured head.81 whioh is received on the lower end of the bolt 21 thereby fixedly securing the adjusting screw with respect to the bearing member 15 and inclinedbar 10. The opposite end of the adjsting serew 80 passes through a lug 32 struek out from the elamping plate 18 and nnts threaded thereon for moving and loeking tliis adjusting serew with respect to the lug 32.

It Wlll tl1us be apparent that by loosening tl1e dumping n1ernbeis 19 and 21 and by properlyadjusting the nnts 33,tl1e dumping plate 18 and W1i'h it the -f'ork 12, may be moved longitudinally with respect to the bearing ineinlier 15, and with it the seat post 10, thereby varying the distance between the sprocket wheels 17 and 25 to adjust the tension of the sprocket chain 26.

Fro1n an inspection of Figures 5 and 6 it will be observcd that the rear end of the bar 6 is made of hexagonal cross section, whereas tl1e clamping surface of the bearino membcr 15 is formed with a base portion 11:) and two angularly. disposed sidc portions 215 to engage th1cesides of the end of the bar 6 while the clamping surface of tl1e plate 18 is also formcd with a base and two side'portions to engagc,thc remaining threc sides of the end of the bar 6 so as to prevent relative rotation betwecn thcse parts.

From the foregoing description taken in connection with tl1e accompanying drawings it Wlll bc apparent that I have clevised a girls sidcwalk bicycle in Which tl1c main portion thcrcof is composcd of front and rear frame membcrswhich may be readily disconnccted for shipping purposes and which may alsO be readily asscmblcd when it is desired to place the sidewalk bicycle in use. It Will also be apparent that I have dcvised a rclativcly simple and inexpcnsive construction of a eidewalk bicyclewhich is strong and durable in operation and which is rcadily adjustable by the simple opcration of an adjusting scrcw t0 vary thc tension on the sprocket chain which forms an clcmcnt of the driving mechanism.

In accordance with the patent statutes I have described What I now believe to be the best embodimcnt of the invention but I do not wish to be understood therebyas limiting myself or the scope of the invention, as many changes andmodifications may be made without dcparting from the spirit of the invention; all such I aim to include in the scope of the appendcd claims.

hat I claim as ncw and desire to sccure by -Letters Patent is wheels mounted on the lower encls of said scat post and rearwardly 1ncl1ncd membcr, a sprocket cha1n assoc1atcd w1th sa1d whecls,

a front frame or bar, clamping means for securing the front framc to the lowcr end of the scat post, and an acljnstablc coDncction betwccn said scat post and clamping means to vary the tension on said chain.

2. A sidewalk bicycle including a triangular rear frame comprising a scat post, a rcarwardly inclined membcr pivotcd to the upper end of the scat post, a substantially horizontal membcr connected to the lower end of said rearwardly inclined membcr sprocket whecls mounted on tlie lower ends of said seat post and rearwardly inclined membcr, a front frame or bar, a clamping plate connected to the forward end of said horizontal membcr. means for drawing said clamping plate into clamping position with respect to said front frame, and an adjustablc conncction between the clamping plate and scat post.

3. A sidewalk bicycle including a scat post, a clampingplatc adjustably connected to the loWer end of said scat post, and a front framc membcr or bar having its rcar end disposed betwccn said clamping plate and scat post.

4. A sidcWalk bicycle including a scat post, a base member of angular cross section secured to thclower end of the seat post, a clamping plate of angular cross section disposed in cooperativc relation to said base membcr, a front frame or bar having a rear end of angular cross section disposed betwccn 'said base membcr and clamping plate, and

mcans for adjusting said clamping plate toward and from the base membcr.

5. A sidewalk bicycle including a scat post, a bearing secured to the lowcr end of the scat post, a base membcr of angular cross section connectcd to,thc under side of the bearing, a clamping plate of angular cross section disposed-in cooperative relation to said base membcr, a front frame or bar having a rcar end of angular cross section disposed bclwccu said base membcr and clamping plate, and means for adjusting said clamping, plate toward and from the base membcr.

JOSEPH L. SCHWAR-TZ. 

